Reinforcement for pneumatic tires.



M. PATRICK.

REINFORCEMENT FOR PNEUMATIC TIRES.

APPLICATION FILED AUG.28, 1914.

Patented Nov. 9, 1915.

-ments in Reinforcement for re snare PATENT WF I a2; PATRICK, 0FGERALDINE, SOUTH CANTERBURY, END.

mroncnrrnn'r ron. manor same 'rrs.

specification of Letters Patent.

' Patented Nov. SH), 1915.

Application filed August 28, 19M. Serial No. 859,125.

To all whom it may concern;

Be it known that I, MAXTON Pxrmoma citizen of the Dominion of NewZealand, and residing at Geraldine, South'Canter- ,bury, in theProvincial District of Canterand provides improved means-for reinforcing rubber tires so that they shall withstand great pressure ofinflation by compressed air.

The object of the invention is to increase considerably the life ofpneumatic tires by preventing blow outs so common with tires of thisdescription.

The invention consists in forming a metal reinforcement consisting of aplurality of Wire hoops shaped to correspond to a cross section of thetire, the said hoops being woven or threaded into canvas, the outercover and an inner lining of rubber being superposed upon the canvas andthehoops.

The manufacture of reinforcement is conveniently carried out byinserting lengths of wire a strip of canvas and afterward pressing thesame until the wires assume a hoop shape corresponding to the crosssection of the tire.

The invention is illustrated in the accompanying drawing wherein Figure1, is a side elevation, and Fig. 2, is a, perspective elevation partlyin section of a portion of a tire embodying the invention, Fig. 3, is across section of the tire on line AA of Fig. 1, Fig. 4, is an elevationof a hoop, and Fig. 5, is a cross sectional elevation of part of a tireshowing a modified form of hoop.

A plurality of wire hoops 1 having the shape of the cross section of thetlre are threaded into canvas 2, formin part of the tire and so that thesaid hoops orm a series extending throughout the circumference of thetire. The ends of the hoops are formed into loops 3 and circumferentialinextensible wires 4 pass through the loops upon each side of the tire.The outer covering 5 of rubber is molded or otherwise attached to thecanvas 2, and an inner lining 6 of rubber and'fabric is. similarlyattached to the interior of the canvas. The hoops 1, the canvas 2, theloops 3 and the wires 4,

are thus embedded between the outer cover 5 and the inner lining 6 ofrubber and fabric.

In Fig. 5 the hoops 1 terminate in hooks 7, which extend along the toe 8of the tire. The circumferential inextensible wires 4 lie in the kinks 9of the hooks 7. By inserting .the wires 4 in the loops or hooks of thehoops the reinforcement is considerably strengthened.

What I do claim and desire to secure by Letters Patent of the UnitedStates is 1. A reinforcement for pneumatic tires consisting of aplurality of independent wire hoops each threaded through holes in acommon canvas strip and each arranged in a plane radial to the tire,said hoops and canvas being embedded in the tire, and the hoops being ofsuflicient rigidity to maintain their shape when threaded through thecanvas.

.2. A reinforcement for pneumatic tires consisting of a plurality ofindependent wire hoops each threaded through holes in a common canvasstrip and each arranged in a plane radial to the tire, said hoops andcanvas being embedded between an outer cover of rubber and an' innerlining ofrubber and canvas and the hoops being of sufficient rigidity tomaintain their shape when threaded through the canvas.

3. A reinforcement for pneumatic tires consisting of a. plurality ofindependent .wire, hoops, terminating in loops, each 1 threaded throughholes in a common canvas stripand each arranged in aplane radial to ithe tire, said hoops and canvas being embedded in the tire and the hoopsbeing of suflicient rigidityto maintain their shape stri}l)1 and eacharranged in a plane radial In testimony whereof I have signed my to t etire, and inextensible wlres passing name to this specification in thepresence of 10 through said lgops, gagid hoops, canvas and twowitnesses. A. wires being em edde etween an outer cover V 1 of rubberand an inner lining of rubber and MAXTON PATRICK canvas and the hoopsbelng of sufficlent ri- Witnesses:

gidity to malntam their shape when thread- GEORGE ALFRED JAMES HART,

ed through the canvas. ALFRED JAMES ALLARD.

